package org.opencv.core;

//javadoc:Scalar_
public class Scalar {

	public double val[];

	public Scalar(double v0, double v1, double v2, double v3) {
		val = new double[] { v0, v1, v2, v3 };
	}

	public Scalar(double v0, double v1, double v2) {
		val = new double[] { v0, v1, v2, 0 };
	}

	public Scalar(double v0, double v1) {
		val = new double[] { v0, v1, 0, 0 };
	}

	public Scalar(double v0) {
		val = new double[] { v0, 0, 0, 0 };
	}

	public Scalar(double[] vals) {
		if (vals != null && vals.length == 4)
			val = vals.clone();
		else {
			val = new double[4];
			set(vals);
		}
	}

	public void set(double[] vals) {
		if (vals != null) {
			val[0] = vals.length > 0 ? vals[0] : 0;
			val[1] = vals.length > 1 ? vals[1] : 0;
			val[2] = vals.length > 2 ? vals[2] : 0;
			val[3] = vals.length > 3 ? vals[3] : 0;
		} else
			val[0] = val[1] = val[2] = val[3] = 0;
	}

	public static Scalar all(double v) {
		return new Scalar(v, v, v, v);
	}

	public Scalar clone() {
		return new Scalar(val);
	}

	public Scalar mul(Scalar it, double scale) {
		return new Scalar(val[0] * it.val[0] * scale, val[1] * it.val[1] * scale, val[2] * it.val[2] * scale,
				val[3] * it.val[3] * scale);
	}

	public Scalar mul(Scalar it) {
		return mul(it, 1);
	}

	public Scalar conj() {
		return new Scalar(val[0], -val[1], -val[2], -val[3]);
	}

	public boolean isReal() {
		return val[1] == 0 && val[2] == 0 && val[3] == 0;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + java.util.Arrays.hashCode(val);
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (!(obj instanceof Scalar))
			return false;
		Scalar it = (Scalar) obj;
		if (!java.util.Arrays.equals(val, it.val))
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "[" + val[0] + ", " + val[1] + ", " + val[2] + ", " + val[3] + "]";
	}

}
